Frost Line Depth in Amarillo, TX: Texas Codes Range 0

No official local value

No official frost line depth is published for Amarillo.

No verified code nearby; verified Texas codes range 0–12 in.

Source and how we checked

We searched this place’s own code and website and found no published frost line depth.

Climate: 117 nights a year at or below 32 °F (NOAA 1991–2020, Amarillo 7Ene, 7.4 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

0–12 inrange of verified Texas codes
117nights a year at or below 32 °F
100%of nearby soil rated “none” for frost action (USDA)

Does Amarillo have an official frost line depth?

No adopted frost line depth found for Amarillo in its official documents (checked Oct 2026). No verified code lies near Amarillo; the Texas codes we verified range from 0 to 12 in. Ask the building department for Amarillo’s own number before you dig.

What frost line depth does Amarillo use for footings under Table R301.2(1)?

Call 811 at least a few working days before you dig, so buried lines are marked.
Confirm the frost line depth with the Amarillo building department.
Ask whether your project needs a permit (decks, larger sheds and footings usually do).
Dig below 12 in (the deepest verified state value) unless the building department tells you otherwise.
Book the footing inspection before you pour concrete.

How deep do footings, decks and water lines need to be in Amarillo?

Drawn with the deepest Texas official value (12 in). Confirm Amarillo’s own depth before you dig.

House or garage footing Deck footing Water service line Fence post

House or garage footing in Amarillo: dig at least 12 in (30 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).

Using the nearby official value of 12 in until Amarillo confirms its own
Project	Depth	Rule
House or garage footing	12 in	Below the frost line and at least 12 in deep (IRC R403.1.4)
Deck footing (attached)	12 in	Below the frost line and at least 12 in deep (IRC R507.3)
Water service line	18 in	6 in below the frost line and at least 12 in deep (IRC P2603.5)
Fence post bottom	12 in	No code rule; common practice is below the frost line

Work out posts, concrete and footing sizes with the fence post depth calculator or the deck footing calculator.

How cold does it get in Amarillo?

Average lows are at or below freezing from Nov to Feb. 117 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 21.7 °F.

NOAA 1991–2020 climate normals, Amarillo 7ene station, 7.4 mi away, elevation 3,590 ft.

Monthly temperatures as a table

°F	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Low	21.7	24.7	32.2	39.7	50	60.1	64.7	63.5	55.9	42.6	31.1	22.7
High	50.7	54.6	62.6	70.4	79	88.4	92	90.3	83.7	72.5	60.8	50.8

Amarillo has more freezing nights than 168 of the 168 other Texas places we track. The Texas median is 32. Coldest: Amarillo; mildest: Brownsville.

How likely is the soil in Amarillo to heave?

None 100%

USDA rates the sampled soil around Amarillo as 100% none for frost action (main soils: Pullman, Estacado, Pep).

USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.

Amarillo at a glance

Frost line depth: No official local value
County: Randall County
Population (2023 est.): 202,408
Mean annual temperature: 56.9 °F
ZIP codes (14): 79101 · 79102 · 79103 · 79104 · 79106 · 79107 · 79108 · 79109 · 79110 · 79111 · 79118 · 79119 · 79121 · 79124